I realized I hadn't mentioned one of my favourite summer salads for hot, hot days. It's Nigella Lawson's Watermelon, Feta and Olive salad. I know that sounds like an odd mix, but it's very refreshing.
Watermelon, Feta and Olive Salad
1/2 red onion, thinly sliced
Juice of 2 limes
Half a watermelon
Handful of parsely, chopped
Hanful of mint, chopped
3 Tbsp. olive oil
8 oz. feta, chunked
4 oz black olives, pitted
Marinate the red onion in the lime juice for 15 or 10 minutes.
Cube the watermelon into bite sizes. Toss with feta, parsley and mint.
Add the onion and lime juice, olive oil and olives and toss to mix.